All,
I have a field in a comma seperated file with hundreds of lines and about 20 columns and I wish to remove all numbers after the decimal point in field 4 on each line and output the rest to another file or write it back to itself.
File is like this
20070126, 123.0, GBP, 1234.5678,... (9 Replies)
Hi,
I need to split xml-files with sizes greater than 2 gb into smaler chunks. As I dont want to end up with billions of files, I want those splitted files to have configurable sizes like 250 MB. Each file should be well formed having an exact copy of the header (and footer as the closing of the... (0 Replies)
Let's say I have a very long string with no spaces but just words stored in $very_long_string.
$very_long_string = "aaaaaaaaaaabbbbbbbbbbbccccccccccccdddddddddddd";
I can do this to split the string into 1 character each and store them in an array:
@myArray = split(//, $very_long_string); ... (3 Replies)
How do I split a file into many parts but with different amounts of lines per part? I looked at the split command but that only splits evenly.
I'd like a range specified to determine how many lines each output file should have.
For example, if the input file has 1000 lines and the range is... (1 Reply)
How can i break a text file into parts that occur between a specific pattern?
I have text file having various xml many tags like which starts with the tag "<?xml version="1.0" encoding="utf-8"?>" . I have to break the whole file into several xmls by looking for the above pattern.
All the... (9 Replies)
How do you truncate specific parts of a string.
Example:
1 This is the string
Goal:
This is the string
As you can see I'm trying to simply remove the first two characters of the string the number one and the space between the one and the word "this."
Your help is appreciated.
... (8 Replies)
Hello. I need help with copying part of a file structure to another directory while still keeping the structure. For example look below:
../folder1/sub1/txt.txt
../folder1/sub2/pic.png
../folder2/sub1/pic.png
../folder2/sub2/txt.txt
So in this I would like to copy only the directories and... (3 Replies)
Hi all,
I desperately need a small script which deletes everything in a particular .txt file when "Abs = {" appears till "},", and also when "B-1 = {" appears till "},"
I would like all the text in between of those instances to be deleted, however, other text to be unedited (kept as it is).... (12 Replies)
I am trying to add a condition to the below perl that will capture the GTtag and place a specific string in the last field of each line. The problem is that the GT value used is not right after the tag rather it is a few fields away. The values should always be 0/1 or 1/2 and are in bold in the... (12 Replies)
Discussion started by: cmccabe
12 Replies
LEARN ABOUT FREEBSD
netgroup
NETGROUP(5) BSD File Formats Manual NETGROUP(5)NAME
netgroup -- defines network groups
SYNOPSIS
netgroup
DESCRIPTION
The netgroup file specifies ``netgroups'', which are sets of (host, user, domain) tuples that are to be given similar network access.
Each line in the file consists of a netgroup name followed by a list of the members of the netgroup. Each member can be either the name of
another netgroup or a specification of a tuple as follows:
(host, user, domain)
where the host, user, and domain are character string names for the corresponding component. Any of the comma separated fields may be empty
to specify a ``wildcard'' value or may consist of the string ``-'' to specify ``no valid value''. The members of the list may be separated
by whitespace and/or commas; the ``'' character may be used at the end of a line to specify line continuation. Lines are limited to 1024
characters. The functions specified in getnetgrent(3) should normally be used to access the netgroup database.
Lines that begin with a # are treated as comments.
NIS /YP INTERACTION
On most other platforms, netgroups are only used in conjunction with NIS and local /etc/netgroup files are ignored. With FreeBSD, netgroups
can be used with either NIS or local files, but there are certain caveats to consider. The existing netgroup system is extremely inefficient
where innetgr(3) lookups are concerned since netgroup memberships are computed on the fly. By contrast, the NIS netgroup database consists
of three separate maps (netgroup, netgroup.byuser and netgroup.byhost) that are keyed to allow innetgr(3) lookups to be done quickly. The
FreeBSD netgroup system can interact with the NIS netgroup maps in the following ways:
o If the /etc/netgroup file does not exist, or it exists and is empty, or it exists and contains only a '+', and NIS is running,
netgroup lookups will be done exclusively through NIS, with innetgr(3) taking advantage of the netgroup.byuser and netgroup.byhost
maps to speed up searches. (This is more or less compatible with the behavior of SunOS and similar platforms.)
o If the /etc/netgroup exists and contains only local netgroup information (with no NIS '+' token), then only the local netgroup
information will be processed (and NIS will be ignored).
o If /etc/netgroup exists and contains both local netgroup data and the NIS '+' token, the local data and the NIS netgroup map will
be processed as a single combined netgroup database. While this configuration is the most flexible, it is also the least effi-
cient: in particular, innetgr(3) lookups will be especially slow if the database is large.
FILES
/etc/netgroup the netgroup database
COMPATIBILITY
The file format is compatible with that of various vendors, however it appears that not all vendors use an identical format.
SEE ALSO getnetgrent(3), exports(5)BUGS
The interpretation of access restrictions based on the member tuples of a netgroup is left up to the various network applications. Also, it
is not obvious how the domain specification applies to the BSD environment.
The netgroup database should be stored in the form of a hashed db(3) database just like the passwd(5) database to speed up reverse lookups.
BSD December 11, 1993 BSD